from the designer: “No instructions for heel are included.”
for stripey sock:

Yarn

Novita Tennessee (100 % mercerized cotton) white (010) and pink (502) approximately 30 g each.

Needles

3 mm or size to obtain gauge

Gauge

26 sts and 36 rounds in st st = 10 cm

Size

Approximately 22/23 (size used in Scandinavia, for further details, see “Measurements of finished sock”)

Measurements of finished sock

Height of leg without heel: 9 cm

Circumference of foot: 15 cm

Length of foot including heel: 15 cm

for lacy heart sock:

Novita Tennessee (100 % mercerized cotton) pink (502) approximately 60 g

Needles

No. 3 mm or size to obtain gauge

Gauge

26 sts and 36 rows st st = 10 cm

Size

Approximately 20/21 (size used in Scandinavia -> for further details, see “Measurements of finished sock”)

Measurements of finished sock

Height of leg without heel: 9 cm

Circumference of foot: 14 cm

Length of foot including heel: 14 cm

for heart socks in white and pink:

“The heel and uppermost part of the sock are worked in moss stitch. Duplicate stitch is used to add hearts to the finished socks.”

Yarn

Novita Tennessee (100 % mercerized cotton) white (010) approximately 60 g and a small amount of pink (502)

Needles

3 mm or size to obtain gauge

Gauge

26 sts and 36 rows in st st = 10 cm

Size

Approximately 22/23 (size used in Scandinavia, for further details, see “Measurements of finished sock”)

Measurements of finished sock

Height of leg without heel: 10 cm

Circumference of foot: 15 cm

Length of foot including heel: 15 cm